【摘要】：鈍化發(fā)射極背面接觸(PERC)雙面太陽電池(PERC+)背面采用絲網(wǎng)印刷鋁柵線的設計,代替常規(guī)PERC電池背面全鋁背場層,達到背面發(fā)電的效果。對不同背面鋁柵線寬度的PERC+電池和常規(guī)PERC電池的電性能及激光開窗截面圖進行比較,發(fā)現(xiàn)了不同寬度的鋁柵線對電池背面空洞率和局部背表面場(LBSF)層的質(zhì)量有較大影響,合適的鋁柵線寬度能最大程度地保證PERC+電池的轉(zhuǎn)換效率。實驗得出在相同的激光開窗工藝下,當背面鋁柵線設計寬度為250μm時,PERC+電池具有較好的鋁柵線高寬比,燒結(jié)后的激光開窗區(qū)域形成了良好的LBSF層。同時,所有電池在測試時背景采用不反光黑布。測試結(jié)果顯示,最優(yōu)組的PERC+電池平均正面轉(zhuǎn)換效率達到21.21%、平均背面轉(zhuǎn)換效率達到13.97%。
[Abstract]:The design of screen printed aluminum grid line is adopted on the back of passivated emitter contact (PERC) double-sided solar cell (PERC), which replaces the all-aluminum back field layer on the back of conventional PERC battery to achieve the effect of back power generation. The electrical performance and laser window section diagram of PERC battery with different back aluminum grid wire width and conventional PERC battery are compared. It is found that the aluminum grid line with different width has a great influence on the cavitation rate on the back of the battery and the quality of the (LBSF) layer on the local back surface field. The suitable width of aluminum grid line can ensure the conversion efficiency of PERC battery to the greatest extent. The experimental results show that under the same laser window opening process, when the design width of the back aluminum grid line is 250 渭 m, the PERC battery has a good aspect ratio of the aluminum grid line, and a good LBSF layer is formed in the sintered laser windowing area. At the same time, all batteries in the test background using non-reflective black cloth. The test results show that the average positive conversion efficiency and back conversion efficiency of PERC battery in the optimal group are 21.21% and 13.97% respectively.
【作者單位】： 國家電投集團西安太陽能電力有限公司;
【分類號】：TM914.4

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